Pando, this gigantic quaking aspen located in Utah, is considered one of the largest and oldest living organisms on Earth. Spanning over 43 hectares, it comprises nearly 47,000 stems all connected through a single root system. But recently, Pando has revealed another fascinating aspect: its sounds, studied by bioacousticians who are looking to better understand its health and the underground phenomena taking place.
The Sounds of Pando: A Unique Project
In 2023, researchers, including bioacoustician Jeff Rice, undertook an innovative project to record the sounds emitted by Pando. Equipped with specialized microphones such as hydrophones (typically used underwater), they captured not only the rustling of leaves and the animals inhabiting this ecosystem but also unheard sounds coming from the roots and the soil. Among these, they discovered deep rumblings and vibrations revealing the underground activity of the root system.
These recordings are not just aesthetic: they allow scientists to study the internal structure of this organism and monitor factors like water flow, root health, and even potential threats such as diseases. These acoustic analyses offer a non-invasive method to understand Pando's "health" and could potentially help preserve it.
Interconnection Through Sound
One of the major discoveries was showing how sounds can travel through Pando's roots. During their research, scientists tapped on a branch about a hundred meters from an acoustic sensor buried near the roots, and they clearly heard the resonance of that tap. This proves the physical and acoustic interconnection across the entire root system, reinforcing the idea that Pando functions as a single, giant organism.
Towards a New Scientific Approach
This project, initially started as an artistic exploration, opens up fascinating scientific perspectives. In addition to documenting the local wildlife through sounds captured in and around Pando, this bioacoustic research could help better understand the interactions between the tree and its environment. It is even being considered to use ultrasonic sounds to repel deer, which graze on Pando's young shoots and hinder its regeneration.
Pando, seemingly silent, is beginning to tell its story through its sounds. This new sonic dimension could be key to ensuring its survival for future generations.
Conclusion
Have you ever wondered what an old, vast tree like Pando might "say"? What other acoustic mysteries could be hiding in nature?
